Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/16/2020   22:39:49   (   0.00,-137.23) (  -0.40,-139.04)  206.23                80
 12/17/2020   22:23:45   (   0.00,-137.23) (   0.61,-134.51)  310.03                80
 12/19/2020   10:42:53   (  -0.00,-137.23) (   0.55,-139.78)  290.40                80
 12/20/2020   10:26:49   (  -0.00,-137.23) (  -0.46,-135.25)  225.73                80
 12/21/2020   22:46:05   (   0.01,-137.22) (  -0.76,-140.55)  380.14                80
 12/22/2020   22:30:01   (   0.01,-137.22) (   0.25,-136.02)  135.87                80
 12/24/2020   10:49:09   (  -0.00,-137.22) (   0.91,-141.30)  465.08                80
 12/25/2020   10:33:04   (   0.00,-137.21) (  -0.10,-136.77)   50.55                80
 12/27/2020   22:33:36   (  -0.01,-137.18) (  -0.11,-137.54)   41.22                80
 12/28/2020   22:17:32   (  -0.01,-137.17) (   0.90,-133.01)  473.66                80